Patent GB-753419-A (GB)
Abstract: 753,419. Calculating-apparatus. BURROUGHS CORPORATION. Aug. 17, 1954 [Sept. 2, 1963], No. 23928/54. Class 106 (1). An independently-operated accounting machine has a record-material supporting arrangement incorporating parts movable, by the machine driving mechanism in a machine cycle after printing, from a printing position to a position facilitating the insertion of recordmaterial and means controlled by at least one of a group of differentially-settable type carriers in accordance with the setting thereof to permit or prevent operation of the movable parts. The invention is embodied in the machine described in Specification 709,181 having, in a travelling carriage, a roller platen movable by power means from a printing position to an open frontfeed position, and being modified by the substitution for the rear add-subtract totalizer of two lines each of four interspersed totalizers. Totalizer selection under carriage control. The control projection in lane 25 of the carriage programme unit determines the rise of a sensing pin and consequently the movement of a link 2928, Fig. 5, connected to a slide 2837. Pinions 2833 positioned by this slide shift axially the two lines of interspersed totalizers to select a corresponding totalizer in each. The mechanism is restored at the end of each operation to place a first totalizer in each line in operative position. Carriage opening under carriage control. When a control projection is present in lane 14 of the programme unit, a corresponding control lever 1864 is rocked counterclockwise and a stud 2029 in a yoke coupled to the lever 1864 depresses a control link 1646 into an effective position in which it is actuated as described in the prior Specification to open the carriage. The lever 1864 is held in its operated position by a latch 1927 until near the end of the cycle when the latch is disengaged by the action of a stud in a cam-controlled slide. Preventing automatic opening of carriage. The latch 1927 may be disabled before the carriage-opening mechanism operates by a stud 3311 in an arm 3308 of a yoke 3306 rocked for this purpose by a slide 3301 controlled, as are the differential actuators, by a bail 531. Normally the slide 3301 is held inactive by an arm 3321 of a yoke 3320, but if this is rocked clockwise, the slide 3301 moves forwardly and, on its return, a by-pass pawl 3315 carried, thereby engages a stud 3314 in an arm 3307 of the yoke 3306 and rocks the latter to release the latch 1927. The yoke 3320 (see also Fig. 7), has two arms 3325, 3330 normally blocked by arms 3326, 3336 respectively. The arm 3326 is coupled to the printing-hammer latch 622 for the unit-dollars order (there are two lower orders) and is moved from blocking position when the latch is released, such release is effected by the mechanism described in the prior Specification for controlling the printing of zeros, only when the amount to be printed is not less than 1 dollar. The arm 3336 is fast with an arm 3337 having a cam surface by which it is rocked to move the arm 3336 from blocking position by a stud 3339 in the symbol type bar for the front totalizer only when the latter is positioned to print a total symbol. Thus automatic opening of the carriage is only prevented when a total is taken of an amount not less than 1 dollar. In these circumstances, the operator must depress the carriage-opening key and is consequently warned that special action, e.g. the sending of a reminder, is necessary. The suppression of the automatic carriage opening just described is only effective in certain columnar positions under control of lane 25 of the programme unit which as above described determines the movement of the totalizerselecting slide 2837. Normally, i.e. when the interspersed totalizer lines are positioned to select the first totalizer in each, a stud 3355 in a slide 3352 coupled to the slide 2837 blocks movement of the slide 3301. If, however, different totalizers are selected, the stud 3355 is moved from blocking position.